Arch Linux Security Advisory ASA-202105-5

Severity: High
Date : 2021-05-19
CVE-ID : CVE-2021-29952
Package : firefox
Type : arbitrary code execution
Remote : Yes
Link : https://security.archlinux.org/AVG-1917

Summary

The package firefox before version 88.0.1-1 is vulnerable to arbitrary
code execution.

Resolution

Upgrade to 88.0.1-1.

pacman -Syu “firefox>=88.0.1-1”

The problem has been fixed upstream in version 88.0.1.

Workaround

None.

Description

A security issue has been found in Firefox before version 88.0.1. When
Web Render components were destructed, a race condition could have
caused undefined behavior, and Mozilla presumes that with enough effort
may have been exploitable to run arbitrary code.

Impact

A remote attacker could execute arbitrary code through a crafted HTML
page.

References

https://www.mozilla.org/en-US/security/advisories/mfsa2021-20/#CVE-2021-29952
https://bugzilla.mozilla.org/show_bug.cgi?id=1704227
https://security.archlinux.org/CVE-2021-29952